Mr.FIsher can kick a 2 kg football upwards at 20m/s, how high does the football travel?
take the initial KEnergy, set it equal to the maximum gravitational potential energy gained.
1/2 m v^2=mgh
or height= 1/2 v^2/g
1/2 m v^2=mgh
or height= 1/2 v^2/g